1. Sorbonne Universités, UPMC Univ Paris 6, CNRS, IRD, MNHN, LOCEAN-IPSL; Paris France
2. National Oceanography Centre, Marine Physics and Ocean Climate; Southampton UK
3. Université de Versailles St-Quentin, Sorbonne Universités, UPMC Univ Paris 6, CNRS, LATMOS-IPSL; Guyancourt France
4. Center of Excellence in Earth Systems Modeling & Observations, Chapman University; Orange California USA
5. NASA Goddard Space Flight Center; Cryospheric Sciences Laboratory; Greenbelt Maryland USA